Title: Put bitmap to StringGrid
Use StrechDraw property of the StringGrid.Canvas and don't forget to free the bitmap.
procedure TForm1.Button1Click(Sender: TObject);
var
Bitmap: TBitmap;
begin
Bitmap:=TBitmap.Create;
Bitmap.LoadFromFile('factory.bmp');
StringGrid1.Canvas.StretchDraw(StringGrid1.CellRect(1,1),Bitmap);
Bitmap.Free;
end;